Word closes when you hit the X with out asking if you want to save
it.

Click on Start, find, Files or folders. In the named box put
normal.dot and tell it to find... when it finds it hightlight and delete it. Empty
your recycle bin. Right click on it and do empty recycle bin.. Now reopen word.. It
should be fixed it will recreate the normal.dot file. So if it happens again delete
it again. You may want to reboot after you delete it. Side note... you can
only delete the file if word is closed.